it is a happy day in brianspointlessmentalfascinationsville
i found an article i hadn't seen before, see here:
http://irc.nrc-cnrc.gc.ca/fulltext/nrcc ... c44692.pdf
They model the behavior of resilient channel walls based upon (get this ;) )
1. stiffness of the air cavity
2. stiffness of the resilient channel
and outline a new calculation system that includes an equivalent air space to account for channel stiffness. They note that the traditional calculations (air space only) are 2/3 octave or more off, but their new model is typically within a few hertz.
well, glory be. onward and upward goes humanity, what a species.
I wonder if, in time, enough work here and there and everywhere will come into my viewport to justify have NOT done all the work on understanding low frequency wall mechanics that we did here in 2004? Perhaps somewhere out there, each and every aspect of wall behavior that we (a group of chemical-numbed nitwits not hardly qualified to do acoustics research) sat down and fretted and pondered and built and tested and tried again...
every pea-brained, somewhat competent, and truly clever method of modeling these things that we came up with, always winding up with piles of empirical data and guesses as we lack the mathematical background to really make models in the traditional academic sense...
i wonder if all this is already known, or will soon enough be known by someone out there somewhere? and if we could have just found all hte documents, we could have saved ourselves all the trouble?
What amazing fun reading that article was. Also, the Lin and Garrelick article... my goodness what a thrill it was to find that article, which less or more stated everything we already knew, but stated by them 10,000 times more formally (and competently, i'm sure).
life is such a strange, strange thing. And i really, really don't care if anybody ever reads a bit of what we did here to model walls, as long as over time it's proven to be right by those best equipped to prove it, i'll drink and be merry.
check out that article, it's awesome. i'm gonna send the NRC a valentine next year.